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secondary 3 | A Maths
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Pls help me ASAP thx
Date Posted: 2 years ago
Views: 424
Discriminant of roots of equation
= b² - 4ac
= 4² - 4 (2) (1 - k)
= 16 - 8 (1 - k)
= 16 - 8 + 8k
= 8 + 8k
which will be negative when k < -1, indicating that the curve will not have any intersection with the horizontal x-axis, and using the other fact that the coefficient of x² is also positive, the curve will certainly lie above the x-axis completely.
= b² - 4ac
= 4² - 4 (2) (1 - k)
= 16 - 8 (1 - k)
= 16 - 8 + 8k
= 8 + 8k
which will be negative when k < -1, indicating that the curve will not have any intersection with the horizontal x-axis, and using the other fact that the coefficient of x² is also positive, the curve will certainly lie above the x-axis completely.
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Thx alot
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